It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 734 is not a prime number.
For example, 397 734 can be divided by 2: 397 734 / 2 = 198 867.
For 397 734 to be a prime number, it would have been required that 397 734 has only two divisors, i.e., itself and 1.
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397 734 is an even number, because it is evenly divisible by 2: 397 734 / 2 = 198 867.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 397 734 is about 630.662.
Thus, the square root of 397 734 is not an integer, and therefore 397 734 is not a square number.
The square of a number (here 397 734) is the result of the product of this number (397 734) by itself (i.e., 397 734 × 397 734); the square of 397 734 is sometimes called "raising 397 734 to the power 2", or "397 734 squared".
The square of 397 734 is 158 192 334 756 because 397 734 × 397 734 = 397 7342 = 158 192 334 756.
As a consequence, 397 734 is the square root of 158 192 334 756.
The multiples of 397 734 are all integers evenly divisible by 397 734, that is all numbers such that the remainder of the division by 397 734 is zero. There are infinitely many multiples of 397 734. The smallest multiples of 397 734 are: